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1da177e4 | 1 | /* |
aa650bbd | 2 | * battery.c - ACPI Battery Driver (Revision: 2.0) |
1da177e4 | 3 | * |
aa650bbd AS |
4 | * Copyright (C) 2007 Alexey Starikovskiy <astarikovskiy@suse.de> |
5 | * Copyright (C) 2004-2007 Vladimir Lebedev <vladimir.p.lebedev@intel.com> | |
1da177e4 LT |
6 | * Copyright (C) 2001, 2002 Andy Grover <andrew.grover@intel.com> |
7 | * Copyright (C) 2001, 2002 Paul Diefenbaugh <paul.s.diefenbaugh@intel.com> | |
8 | * | |
9 | * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ | |
10 | * | |
11 | * This program is free software; you can redistribute it and/or modify | |
12 | * it under the terms of the GNU General Public License as published by | |
13 | * the Free Software Foundation; either version 2 of the License, or (at | |
14 | * your option) any later version. | |
15 | * | |
16 | * This program is distributed in the hope that it will be useful, but | |
17 | * WITHOUT ANY WARRANTY; without even the implied warranty of | |
18 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
19 | * General Public License for more details. | |
20 | * | |
21 | * You should have received a copy of the GNU General Public License along | |
22 | * with this program; if not, write to the Free Software Foundation, Inc., | |
23 | * 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA. | |
24 | * | |
25 | * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ | |
26 | */ | |
27 | ||
28 | #include <linux/kernel.h> | |
29 | #include <linux/module.h> | |
30 | #include <linux/init.h> | |
31 | #include <linux/types.h> | |
f1d4661a | 32 | #include <linux/jiffies.h> |
0f66af53 | 33 | #include <linux/async.h> |
bc76f90b | 34 | #include <linux/dmi.h> |
f43691c6 | 35 | #include <linux/delay.h> |
5a0e3ad6 | 36 | #include <linux/slab.h> |
25be5821 | 37 | #include <linux/suspend.h> |
4000e626 | 38 | #include <asm/unaligned.h> |
d7380965 | 39 | |
3a670cc7 LT |
40 | #ifdef CONFIG_ACPI_PROCFS_POWER |
41 | #include <linux/proc_fs.h> | |
42 | #include <linux/seq_file.h> | |
43 | #include <asm/uaccess.h> | |
44 | #endif | |
45 | ||
8b48463f | 46 | #include <linux/acpi.h> |
d7380965 AS |
47 | #include <linux/power_supply.h> |
48 | ||
f03be352 AM |
49 | #include "battery.h" |
50 | ||
a192a958 LB |
51 | #define PREFIX "ACPI: " |
52 | ||
1da177e4 LT |
53 | #define ACPI_BATTERY_VALUE_UNKNOWN 0xFFFFFFFF |
54 | ||
1da177e4 | 55 | #define ACPI_BATTERY_DEVICE_NAME "Battery" |
1da177e4 | 56 | |
ae6f6187 LT |
57 | /* Battery power unit: 0 means mW, 1 means mA */ |
58 | #define ACPI_BATTERY_POWER_UNIT_MA 1 | |
59 | ||
1ac5aaa6 ZR |
60 | #define ACPI_BATTERY_STATE_DISCHARGING 0x1 |
61 | #define ACPI_BATTERY_STATE_CHARGING 0x2 | |
62 | #define ACPI_BATTERY_STATE_CRITICAL 0x4 | |
63 | ||
1da177e4 | 64 | #define _COMPONENT ACPI_BATTERY_COMPONENT |
b6ce4083 | 65 | |
f52fd66d | 66 | ACPI_MODULE_NAME("battery"); |
1da177e4 | 67 | |
f52fd66d | 68 | MODULE_AUTHOR("Paul Diefenbaugh"); |
aa650bbd | 69 | MODULE_AUTHOR("Alexey Starikovskiy <astarikovskiy@suse.de>"); |
7cda93e0 | 70 | MODULE_DESCRIPTION("ACPI Battery Driver"); |
1da177e4 LT |
71 | MODULE_LICENSE("GPL"); |
72 | ||
a90b4038 | 73 | static int battery_bix_broken_package; |
f43691c6 | 74 | static int battery_notification_delay_ms; |
f1d4661a AS |
75 | static unsigned int cache_time = 1000; |
76 | module_param(cache_time, uint, 0644); | |
77 | MODULE_PARM_DESC(cache_time, "cache time in milliseconds"); | |
b6ce4083 | 78 | |
3a670cc7 LT |
79 | #ifdef CONFIG_ACPI_PROCFS_POWER |
80 | extern struct proc_dir_entry *acpi_lock_battery_dir(void); | |
81 | extern void *acpi_unlock_battery_dir(struct proc_dir_entry *acpi_battery_dir); | |
82 | ||
83 | enum acpi_battery_files { | |
84 | info_tag = 0, | |
85 | state_tag, | |
86 | alarm_tag, | |
87 | ACPI_BATTERY_NUMFILES, | |
88 | }; | |
89 | ||
90 | #endif | |
91 | ||
1ba90e3a TR |
92 | static const struct acpi_device_id battery_device_ids[] = { |
93 | {"PNP0C0A", 0}, | |
94 | {"", 0}, | |
95 | }; | |
1ba90e3a | 96 | |
aa650bbd | 97 | MODULE_DEVICE_TABLE(acpi, battery_device_ids); |
1da177e4 | 98 | |
7b3bcc4a AS |
99 | enum { |
100 | ACPI_BATTERY_ALARM_PRESENT, | |
c67fcd67 | 101 | ACPI_BATTERY_XINFO_PRESENT, |
557d5868 | 102 | ACPI_BATTERY_QUIRK_PERCENTAGE_CAPACITY, |
4000e626 KI |
103 | /* On Lenovo Thinkpad models from 2010 and 2011, the power unit |
104 | switches between mWh and mAh depending on whether the system | |
105 | is running on battery or not. When mAh is the unit, most | |
106 | reported values are incorrect and need to be adjusted by | |
107 | 10000/design_voltage. Verified on x201, t410, t410s, and x220. | |
108 | Pre-2010 and 2012 models appear to always report in mWh and | |
109 | are thus unaffected (tested with t42, t61, t500, x200, x300, | |
110 | and x230). Also, in mid-2012 Lenovo issued a BIOS update for | |
111 | the 2011 models that fixes the issue (tested on x220 with a | |
112 | post-1.29 BIOS), but as of Nov. 2012, no such update is | |
113 | available for the 2010 models. */ | |
114 | ACPI_BATTERY_QUIRK_THINKPAD_MAH, | |
7b3bcc4a | 115 | }; |
78490d82 | 116 | |
1da177e4 | 117 | struct acpi_battery { |
038fdea2 | 118 | struct mutex lock; |
69d94ec6 | 119 | struct mutex sysfs_lock; |
d7380965 | 120 | struct power_supply bat; |
f1d4661a | 121 | struct acpi_device *device; |
25be5821 | 122 | struct notifier_block pm_nb; |
f1d4661a | 123 | unsigned long update_time; |
016d5baa | 124 | int revision; |
7faa144a | 125 | int rate_now; |
d7380965 AS |
126 | int capacity_now; |
127 | int voltage_now; | |
038fdea2 | 128 | int design_capacity; |
d7380965 | 129 | int full_charge_capacity; |
038fdea2 AS |
130 | int technology; |
131 | int design_voltage; | |
132 | int design_capacity_warning; | |
133 | int design_capacity_low; | |
c67fcd67 AS |
134 | int cycle_count; |
135 | int measurement_accuracy; | |
136 | int max_sampling_time; | |
137 | int min_sampling_time; | |
138 | int max_averaging_interval; | |
139 | int min_averaging_interval; | |
038fdea2 AS |
140 | int capacity_granularity_1; |
141 | int capacity_granularity_2; | |
f1d4661a | 142 | int alarm; |
038fdea2 AS |
143 | char model_number[32]; |
144 | char serial_number[32]; | |
145 | char type[32]; | |
146 | char oem_info[32]; | |
f1d4661a AS |
147 | int state; |
148 | int power_unit; | |
7b3bcc4a | 149 | unsigned long flags; |
1da177e4 LT |
150 | }; |
151 | ||
497888cf | 152 | #define to_acpi_battery(x) container_of(x, struct acpi_battery, bat) |
d7380965 | 153 | |
efd941f1 | 154 | static inline int acpi_battery_present(struct acpi_battery *battery) |
b6ce4083 | 155 | { |
78490d82 AS |
156 | return battery->device->status.battery_present; |
157 | } | |
038fdea2 | 158 | |
d7380965 AS |
159 | static int acpi_battery_technology(struct acpi_battery *battery) |
160 | { | |
161 | if (!strcasecmp("NiCd", battery->type)) | |
162 | return POWER_SUPPLY_TECHNOLOGY_NiCd; | |
163 | if (!strcasecmp("NiMH", battery->type)) | |
164 | return POWER_SUPPLY_TECHNOLOGY_NiMH; | |
165 | if (!strcasecmp("LION", battery->type)) | |
166 | return POWER_SUPPLY_TECHNOLOGY_LION; | |
ad40e68b | 167 | if (!strncasecmp("LI-ION", battery->type, 6)) |
0bde7eee | 168 | return POWER_SUPPLY_TECHNOLOGY_LION; |
d7380965 AS |
169 | if (!strcasecmp("LiP", battery->type)) |
170 | return POWER_SUPPLY_TECHNOLOGY_LIPO; | |
171 | return POWER_SUPPLY_TECHNOLOGY_UNKNOWN; | |
172 | } | |
173 | ||
9104476e | 174 | static int acpi_battery_get_state(struct acpi_battery *battery); |
b19073a0 | 175 | |
56f382a0 RH |
176 | static int acpi_battery_is_charged(struct acpi_battery *battery) |
177 | { | |
1ac5aaa6 | 178 | /* charging, discharging or critical low */ |
56f382a0 RH |
179 | if (battery->state != 0) |
180 | return 0; | |
181 | ||
182 | /* battery not reporting charge */ | |
183 | if (battery->capacity_now == ACPI_BATTERY_VALUE_UNKNOWN || | |
184 | battery->capacity_now == 0) | |
185 | return 0; | |
186 | ||
187 | /* good batteries update full_charge as the batteries degrade */ | |
188 | if (battery->full_charge_capacity == battery->capacity_now) | |
189 | return 1; | |
190 | ||
191 | /* fallback to using design values for broken batteries */ | |
192 | if (battery->design_capacity == battery->capacity_now) | |
193 | return 1; | |
194 | ||
195 | /* we don't do any sort of metric based on percentages */ | |
196 | return 0; | |
197 | } | |
198 | ||
d7380965 AS |
199 | static int acpi_battery_get_property(struct power_supply *psy, |
200 | enum power_supply_property psp, | |
201 | union power_supply_propval *val) | |
202 | { | |
a1b4bd69 | 203 | int ret = 0; |
d7380965 AS |
204 | struct acpi_battery *battery = to_acpi_battery(psy); |
205 | ||
9104476e AS |
206 | if (acpi_battery_present(battery)) { |
207 | /* run battery update only if it is present */ | |
208 | acpi_battery_get_state(battery); | |
209 | } else if (psp != POWER_SUPPLY_PROP_PRESENT) | |
d7380965 AS |
210 | return -ENODEV; |
211 | switch (psp) { | |
212 | case POWER_SUPPLY_PROP_STATUS: | |
1ac5aaa6 | 213 | if (battery->state & ACPI_BATTERY_STATE_DISCHARGING) |
d7380965 | 214 | val->intval = POWER_SUPPLY_STATUS_DISCHARGING; |
1ac5aaa6 | 215 | else if (battery->state & ACPI_BATTERY_STATE_CHARGING) |
d7380965 | 216 | val->intval = POWER_SUPPLY_STATUS_CHARGING; |
56f382a0 | 217 | else if (acpi_battery_is_charged(battery)) |
d7380965 | 218 | val->intval = POWER_SUPPLY_STATUS_FULL; |
4c41d3ad RD |
219 | else |
220 | val->intval = POWER_SUPPLY_STATUS_UNKNOWN; | |
d7380965 AS |
221 | break; |
222 | case POWER_SUPPLY_PROP_PRESENT: | |
223 | val->intval = acpi_battery_present(battery); | |
224 | break; | |
225 | case POWER_SUPPLY_PROP_TECHNOLOGY: | |
226 | val->intval = acpi_battery_technology(battery); | |
227 | break; | |
c67fcd67 AS |
228 | case POWER_SUPPLY_PROP_CYCLE_COUNT: |
229 | val->intval = battery->cycle_count; | |
230 | break; | |
d7380965 | 231 | case POWER_SUPPLY_PROP_VOLTAGE_MIN_DESIGN: |
a1b4bd69 RW |
232 | if (battery->design_voltage == ACPI_BATTERY_VALUE_UNKNOWN) |
233 | ret = -ENODEV; | |
234 | else | |
235 | val->intval = battery->design_voltage * 1000; | |
d7380965 AS |
236 | break; |
237 | case POWER_SUPPLY_PROP_VOLTAGE_NOW: | |
a1b4bd69 RW |
238 | if (battery->voltage_now == ACPI_BATTERY_VALUE_UNKNOWN) |
239 | ret = -ENODEV; | |
240 | else | |
241 | val->intval = battery->voltage_now * 1000; | |
d7380965 AS |
242 | break; |
243 | case POWER_SUPPLY_PROP_CURRENT_NOW: | |
7faa144a | 244 | case POWER_SUPPLY_PROP_POWER_NOW: |
a1b4bd69 RW |
245 | if (battery->rate_now == ACPI_BATTERY_VALUE_UNKNOWN) |
246 | ret = -ENODEV; | |
247 | else | |
248 | val->intval = battery->rate_now * 1000; | |
d7380965 AS |
249 | break; |
250 | case POWER_SUPPLY_PROP_CHARGE_FULL_DESIGN: | |
251 | case POWER_SUPPLY_PROP_ENERGY_FULL_DESIGN: | |
a1b4bd69 RW |
252 | if (battery->design_capacity == ACPI_BATTERY_VALUE_UNKNOWN) |
253 | ret = -ENODEV; | |
254 | else | |
255 | val->intval = battery->design_capacity * 1000; | |
d7380965 AS |
256 | break; |
257 | case POWER_SUPPLY_PROP_CHARGE_FULL: | |
258 | case POWER_SUPPLY_PROP_ENERGY_FULL: | |
a1b4bd69 RW |
259 | if (battery->full_charge_capacity == ACPI_BATTERY_VALUE_UNKNOWN) |
260 | ret = -ENODEV; | |
261 | else | |
262 | val->intval = battery->full_charge_capacity * 1000; | |
d7380965 AS |
263 | break; |
264 | case POWER_SUPPLY_PROP_CHARGE_NOW: | |
265 | case POWER_SUPPLY_PROP_ENERGY_NOW: | |
a1b4bd69 RW |
266 | if (battery->capacity_now == ACPI_BATTERY_VALUE_UNKNOWN) |
267 | ret = -ENODEV; | |
268 | else | |
269 | val->intval = battery->capacity_now * 1000; | |
d7380965 | 270 | break; |
a58e1150 | 271 | case POWER_SUPPLY_PROP_CAPACITY: |
272 | if (battery->capacity_now && battery->full_charge_capacity) | |
273 | val->intval = battery->capacity_now * 100/ | |
274 | battery->full_charge_capacity; | |
275 | else | |
276 | val->intval = 0; | |
277 | break; | |
1ac5aaa6 ZR |
278 | case POWER_SUPPLY_PROP_CAPACITY_LEVEL: |
279 | if (battery->state & ACPI_BATTERY_STATE_CRITICAL) | |
280 | val->intval = POWER_SUPPLY_CAPACITY_LEVEL_CRITICAL; | |
281 | else if (test_bit(ACPI_BATTERY_ALARM_PRESENT, &battery->flags) && | |
282 | (battery->capacity_now <= battery->alarm)) | |
283 | val->intval = POWER_SUPPLY_CAPACITY_LEVEL_LOW; | |
284 | else if (acpi_battery_is_charged(battery)) | |
285 | val->intval = POWER_SUPPLY_CAPACITY_LEVEL_FULL; | |
286 | else | |
287 | val->intval = POWER_SUPPLY_CAPACITY_LEVEL_NORMAL; | |
288 | break; | |
d7380965 AS |
289 | case POWER_SUPPLY_PROP_MODEL_NAME: |
290 | val->strval = battery->model_number; | |
291 | break; | |
292 | case POWER_SUPPLY_PROP_MANUFACTURER: | |
293 | val->strval = battery->oem_info; | |
294 | break; | |
7c2670bb | 295 | case POWER_SUPPLY_PROP_SERIAL_NUMBER: |
296 | val->strval = battery->serial_number; | |
297 | break; | |
d7380965 | 298 | default: |
a1b4bd69 | 299 | ret = -EINVAL; |
d7380965 | 300 | } |
a1b4bd69 | 301 | return ret; |
d7380965 AS |
302 | } |
303 | ||
304 | static enum power_supply_property charge_battery_props[] = { | |
305 | POWER_SUPPLY_PROP_STATUS, | |
306 | POWER_SUPPLY_PROP_PRESENT, | |
307 | POWER_SUPPLY_PROP_TECHNOLOGY, | |
c67fcd67 | 308 | POWER_SUPPLY_PROP_CYCLE_COUNT, |
d7380965 AS |
309 | POWER_SUPPLY_PROP_VOLTAGE_MIN_DESIGN, |
310 | POWER_SUPPLY_PROP_VOLTAGE_NOW, | |
311 | POWER_SUPPLY_PROP_CURRENT_NOW, | |
312 | POWER_SUPPLY_PROP_CHARGE_FULL_DESIGN, | |
313 | POWER_SUPPLY_PROP_CHARGE_FULL, | |
314 | POWER_SUPPLY_PROP_CHARGE_NOW, | |
a58e1150 | 315 | POWER_SUPPLY_PROP_CAPACITY, |
1ac5aaa6 | 316 | POWER_SUPPLY_PROP_CAPACITY_LEVEL, |
d7380965 AS |
317 | POWER_SUPPLY_PROP_MODEL_NAME, |
318 | POWER_SUPPLY_PROP_MANUFACTURER, | |
7c2670bb | 319 | POWER_SUPPLY_PROP_SERIAL_NUMBER, |
d7380965 AS |
320 | }; |
321 | ||
322 | static enum power_supply_property energy_battery_props[] = { | |
323 | POWER_SUPPLY_PROP_STATUS, | |
324 | POWER_SUPPLY_PROP_PRESENT, | |
325 | POWER_SUPPLY_PROP_TECHNOLOGY, | |
c67fcd67 | 326 | POWER_SUPPLY_PROP_CYCLE_COUNT, |
d7380965 AS |
327 | POWER_SUPPLY_PROP_VOLTAGE_MIN_DESIGN, |
328 | POWER_SUPPLY_PROP_VOLTAGE_NOW, | |
7faa144a | 329 | POWER_SUPPLY_PROP_POWER_NOW, |
d7380965 AS |
330 | POWER_SUPPLY_PROP_ENERGY_FULL_DESIGN, |
331 | POWER_SUPPLY_PROP_ENERGY_FULL, | |
332 | POWER_SUPPLY_PROP_ENERGY_NOW, | |
a58e1150 | 333 | POWER_SUPPLY_PROP_CAPACITY, |
1ac5aaa6 | 334 | POWER_SUPPLY_PROP_CAPACITY_LEVEL, |
d7380965 AS |
335 | POWER_SUPPLY_PROP_MODEL_NAME, |
336 | POWER_SUPPLY_PROP_MANUFACTURER, | |
7c2670bb | 337 | POWER_SUPPLY_PROP_SERIAL_NUMBER, |
d7380965 AS |
338 | }; |
339 | ||
3a670cc7 LT |
340 | #ifdef CONFIG_ACPI_PROCFS_POWER |
341 | inline char *acpi_battery_units(struct acpi_battery *battery) | |
342 | { | |
343 | return (battery->power_unit == ACPI_BATTERY_POWER_UNIT_MA) ? | |
344 | "mA" : "mW"; | |
345 | } | |
346 | #endif | |
347 | ||
78490d82 AS |
348 | /* -------------------------------------------------------------------------- |
349 | Battery Management | |
350 | -------------------------------------------------------------------------- */ | |
038fdea2 AS |
351 | struct acpi_offsets { |
352 | size_t offset; /* offset inside struct acpi_sbs_battery */ | |
353 | u8 mode; /* int or string? */ | |
354 | }; | |
b6ce4083 | 355 | |
038fdea2 AS |
356 | static struct acpi_offsets state_offsets[] = { |
357 | {offsetof(struct acpi_battery, state), 0}, | |
7faa144a | 358 | {offsetof(struct acpi_battery, rate_now), 0}, |
d7380965 AS |
359 | {offsetof(struct acpi_battery, capacity_now), 0}, |
360 | {offsetof(struct acpi_battery, voltage_now), 0}, | |
038fdea2 | 361 | }; |
b6ce4083 | 362 | |
038fdea2 AS |
363 | static struct acpi_offsets info_offsets[] = { |
364 | {offsetof(struct acpi_battery, power_unit), 0}, | |
365 | {offsetof(struct acpi_battery, design_capacity), 0}, | |
d7380965 | 366 | {offsetof(struct acpi_battery, full_charge_capacity), 0}, |
038fdea2 AS |
367 | {offsetof(struct acpi_battery, technology), 0}, |
368 | {offsetof(struct acpi_battery, design_voltage), 0}, | |
369 | {offsetof(struct acpi_battery, design_capacity_warning), 0}, | |
370 | {offsetof(struct acpi_battery, design_capacity_low), 0}, | |
371 | {offsetof(struct acpi_battery, capacity_granularity_1), 0}, | |
372 | {offsetof(struct acpi_battery, capacity_granularity_2), 0}, | |
373 | {offsetof(struct acpi_battery, model_number), 1}, | |
374 | {offsetof(struct acpi_battery, serial_number), 1}, | |
375 | {offsetof(struct acpi_battery, type), 1}, | |
376 | {offsetof(struct acpi_battery, oem_info), 1}, | |
377 | }; | |
b6ce4083 | 378 | |
c67fcd67 | 379 | static struct acpi_offsets extended_info_offsets[] = { |
016d5baa | 380 | {offsetof(struct acpi_battery, revision), 0}, |
c67fcd67 AS |
381 | {offsetof(struct acpi_battery, power_unit), 0}, |
382 | {offsetof(struct acpi_battery, design_capacity), 0}, | |
383 | {offsetof(struct acpi_battery, full_charge_capacity), 0}, | |
384 | {offsetof(struct acpi_battery, technology), 0}, | |
385 | {offsetof(struct acpi_battery, design_voltage), 0}, | |
386 | {offsetof(struct acpi_battery, design_capacity_warning), 0}, | |
387 | {offsetof(struct acpi_battery, design_capacity_low), 0}, | |
388 | {offsetof(struct acpi_battery, cycle_count), 0}, | |
389 | {offsetof(struct acpi_battery, measurement_accuracy), 0}, | |
390 | {offsetof(struct acpi_battery, max_sampling_time), 0}, | |
391 | {offsetof(struct acpi_battery, min_sampling_time), 0}, | |
392 | {offsetof(struct acpi_battery, max_averaging_interval), 0}, | |
393 | {offsetof(struct acpi_battery, min_averaging_interval), 0}, | |
394 | {offsetof(struct acpi_battery, capacity_granularity_1), 0}, | |
395 | {offsetof(struct acpi_battery, capacity_granularity_2), 0}, | |
396 | {offsetof(struct acpi_battery, model_number), 1}, | |
397 | {offsetof(struct acpi_battery, serial_number), 1}, | |
398 | {offsetof(struct acpi_battery, type), 1}, | |
399 | {offsetof(struct acpi_battery, oem_info), 1}, | |
400 | }; | |
401 | ||
038fdea2 AS |
402 | static int extract_package(struct acpi_battery *battery, |
403 | union acpi_object *package, | |
404 | struct acpi_offsets *offsets, int num) | |
405 | { | |
106449e8 | 406 | int i; |
038fdea2 AS |
407 | union acpi_object *element; |
408 | if (package->type != ACPI_TYPE_PACKAGE) | |
409 | return -EFAULT; | |
410 | for (i = 0; i < num; ++i) { | |
411 | if (package->package.count <= i) | |
412 | return -EFAULT; | |
413 | element = &package->package.elements[i]; | |
414 | if (offsets[i].mode) { | |
106449e8 AS |
415 | u8 *ptr = (u8 *)battery + offsets[i].offset; |
416 | if (element->type == ACPI_TYPE_STRING || | |
417 | element->type == ACPI_TYPE_BUFFER) | |
418 | strncpy(ptr, element->string.pointer, 32); | |
419 | else if (element->type == ACPI_TYPE_INTEGER) { | |
420 | strncpy(ptr, (u8 *)&element->integer.value, | |
439913ff LM |
421 | sizeof(u64)); |
422 | ptr[sizeof(u64)] = 0; | |
b8a1bdb1 AS |
423 | } else |
424 | *ptr = 0; /* don't have value */ | |
038fdea2 | 425 | } else { |
b8a1bdb1 AS |
426 | int *x = (int *)((u8 *)battery + offsets[i].offset); |
427 | *x = (element->type == ACPI_TYPE_INTEGER) ? | |
428 | element->integer.value : -1; | |
038fdea2 | 429 | } |
b6ce4083 | 430 | } |
b6ce4083 VL |
431 | return 0; |
432 | } | |
433 | ||
434 | static int acpi_battery_get_status(struct acpi_battery *battery) | |
435 | { | |
aa650bbd | 436 | if (acpi_bus_get_status(battery->device)) { |
b6ce4083 VL |
437 | ACPI_EXCEPTION((AE_INFO, AE_ERROR, "Evaluating _STA")); |
438 | return -ENODEV; | |
439 | } | |
aa650bbd | 440 | return 0; |
b6ce4083 VL |
441 | } |
442 | ||
443 | static int acpi_battery_get_info(struct acpi_battery *battery) | |
1da177e4 | 444 | { |
aa650bbd | 445 | int result = -EFAULT; |
4be44fcd | 446 | acpi_status status = 0; |
0f4c6547 | 447 | char *name = test_bit(ACPI_BATTERY_XINFO_PRESENT, &battery->flags) ? |
c67fcd67 AS |
448 | "_BIX" : "_BIF"; |
449 | ||
4be44fcd | 450 | struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL }; |
1da177e4 | 451 | |
b6ce4083 VL |
452 | if (!acpi_battery_present(battery)) |
453 | return 0; | |
038fdea2 | 454 | mutex_lock(&battery->lock); |
c67fcd67 AS |
455 | status = acpi_evaluate_object(battery->device->handle, name, |
456 | NULL, &buffer); | |
038fdea2 | 457 | mutex_unlock(&battery->lock); |
aa650bbd | 458 | |
1da177e4 | 459 | if (ACPI_FAILURE(status)) { |
c67fcd67 | 460 | ACPI_EXCEPTION((AE_INFO, status, "Evaluating %s", name)); |
d550d98d | 461 | return -ENODEV; |
1da177e4 | 462 | } |
a90b4038 LT |
463 | |
464 | if (battery_bix_broken_package) | |
465 | result = extract_package(battery, buffer.pointer, | |
466 | extended_info_offsets + 1, | |
467 | ARRAY_SIZE(extended_info_offsets) - 1); | |
468 | else if (test_bit(ACPI_BATTERY_XINFO_PRESENT, &battery->flags)) | |
c67fcd67 AS |
469 | result = extract_package(battery, buffer.pointer, |
470 | extended_info_offsets, | |
471 | ARRAY_SIZE(extended_info_offsets)); | |
472 | else | |
473 | result = extract_package(battery, buffer.pointer, | |
474 | info_offsets, ARRAY_SIZE(info_offsets)); | |
78490d82 | 475 | kfree(buffer.pointer); |
557d5868 ZR |
476 | if (test_bit(ACPI_BATTERY_QUIRK_PERCENTAGE_CAPACITY, &battery->flags)) |
477 | battery->full_charge_capacity = battery->design_capacity; | |
4000e626 KI |
478 | if (test_bit(ACPI_BATTERY_QUIRK_THINKPAD_MAH, &battery->flags) && |
479 | battery->power_unit && battery->design_voltage) { | |
480 | battery->design_capacity = battery->design_capacity * | |
481 | 10000 / battery->design_voltage; | |
482 | battery->full_charge_capacity = battery->full_charge_capacity * | |
483 | 10000 / battery->design_voltage; | |
484 | battery->design_capacity_warning = | |
485 | battery->design_capacity_warning * | |
486 | 10000 / battery->design_voltage; | |
487 | /* Curiously, design_capacity_low, unlike the rest of them, | |
488 | is correct. */ | |
489 | /* capacity_granularity_* equal 1 on the systems tested, so | |
490 | it's impossible to tell if they would need an adjustment | |
491 | or not if their values were higher. */ | |
492 | } | |
d550d98d | 493 | return result; |
1da177e4 LT |
494 | } |
495 | ||
b6ce4083 | 496 | static int acpi_battery_get_state(struct acpi_battery *battery) |
1da177e4 | 497 | { |
4be44fcd LB |
498 | int result = 0; |
499 | acpi_status status = 0; | |
500 | struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL }; | |
1da177e4 | 501 | |
b6ce4083 VL |
502 | if (!acpi_battery_present(battery)) |
503 | return 0; | |
1da177e4 | 504 | |
f1d4661a AS |
505 | if (battery->update_time && |
506 | time_before(jiffies, battery->update_time + | |
507 | msecs_to_jiffies(cache_time))) | |
508 | return 0; | |
509 | ||
038fdea2 | 510 | mutex_lock(&battery->lock); |
f1d4661a | 511 | status = acpi_evaluate_object(battery->device->handle, "_BST", |
038fdea2 AS |
512 | NULL, &buffer); |
513 | mutex_unlock(&battery->lock); | |
5b31d895 | 514 | |
1da177e4 | 515 | if (ACPI_FAILURE(status)) { |
a6fc6720 | 516 | ACPI_EXCEPTION((AE_INFO, status, "Evaluating _BST")); |
d550d98d | 517 | return -ENODEV; |
1da177e4 | 518 | } |
aa650bbd | 519 | |
038fdea2 AS |
520 | result = extract_package(battery, buffer.pointer, |
521 | state_offsets, ARRAY_SIZE(state_offsets)); | |
f1d4661a | 522 | battery->update_time = jiffies; |
78490d82 | 523 | kfree(buffer.pointer); |
bc76f90b | 524 | |
55003b21 LT |
525 | /* For buggy DSDTs that report negative 16-bit values for either |
526 | * charging or discharging current and/or report 0 as 65536 | |
527 | * due to bad math. | |
528 | */ | |
529 | if (battery->power_unit == ACPI_BATTERY_POWER_UNIT_MA && | |
530 | battery->rate_now != ACPI_BATTERY_VALUE_UNKNOWN && | |
531 | (s16)(battery->rate_now) < 0) { | |
bc76f90b | 532 | battery->rate_now = abs((s16)battery->rate_now); |
55003b21 LT |
533 | printk_once(KERN_WARNING FW_BUG "battery: (dis)charge rate" |
534 | " invalid.\n"); | |
535 | } | |
bc76f90b | 536 | |
557d5868 ZR |
537 | if (test_bit(ACPI_BATTERY_QUIRK_PERCENTAGE_CAPACITY, &battery->flags) |
538 | && battery->capacity_now >= 0 && battery->capacity_now <= 100) | |
539 | battery->capacity_now = (battery->capacity_now * | |
540 | battery->full_charge_capacity) / 100; | |
4000e626 KI |
541 | if (test_bit(ACPI_BATTERY_QUIRK_THINKPAD_MAH, &battery->flags) && |
542 | battery->power_unit && battery->design_voltage) { | |
543 | battery->capacity_now = battery->capacity_now * | |
544 | 10000 / battery->design_voltage; | |
545 | } | |
b6ce4083 VL |
546 | return result; |
547 | } | |
1da177e4 | 548 | |
aa650bbd | 549 | static int acpi_battery_set_alarm(struct acpi_battery *battery) |
1da177e4 | 550 | { |
4be44fcd | 551 | acpi_status status = 0; |
1da177e4 | 552 | |
c67fcd67 | 553 | if (!acpi_battery_present(battery) || |
7b3bcc4a | 554 | !test_bit(ACPI_BATTERY_ALARM_PRESENT, &battery->flags)) |
d550d98d | 555 | return -ENODEV; |
1da177e4 | 556 | |
038fdea2 | 557 | mutex_lock(&battery->lock); |
0db98202 JL |
558 | status = acpi_execute_simple_method(battery->device->handle, "_BTP", |
559 | battery->alarm); | |
038fdea2 | 560 | mutex_unlock(&battery->lock); |
aa650bbd | 561 | |
1da177e4 | 562 | if (ACPI_FAILURE(status)) |
d550d98d | 563 | return -ENODEV; |
1da177e4 | 564 | |
aa650bbd | 565 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Alarm set to %d\n", battery->alarm)); |
d550d98d | 566 | return 0; |
1da177e4 LT |
567 | } |
568 | ||
b6ce4083 | 569 | static int acpi_battery_init_alarm(struct acpi_battery *battery) |
1da177e4 | 570 | { |
b6ce4083 | 571 | /* See if alarms are supported, and if so, set default */ |
952c63e9 | 572 | if (!acpi_has_method(battery->device->handle, "_BTP")) { |
7b3bcc4a | 573 | clear_bit(ACPI_BATTERY_ALARM_PRESENT, &battery->flags); |
f1d4661a | 574 | return 0; |
b6ce4083 | 575 | } |
7b3bcc4a | 576 | set_bit(ACPI_BATTERY_ALARM_PRESENT, &battery->flags); |
f1d4661a AS |
577 | if (!battery->alarm) |
578 | battery->alarm = battery->design_capacity_warning; | |
aa650bbd | 579 | return acpi_battery_set_alarm(battery); |
b6ce4083 | 580 | } |
1da177e4 | 581 | |
508df92d AB |
582 | static ssize_t acpi_battery_alarm_show(struct device *dev, |
583 | struct device_attribute *attr, | |
584 | char *buf) | |
585 | { | |
586 | struct acpi_battery *battery = to_acpi_battery(dev_get_drvdata(dev)); | |
587 | return sprintf(buf, "%d\n", battery->alarm * 1000); | |
588 | } | |
589 | ||
590 | static ssize_t acpi_battery_alarm_store(struct device *dev, | |
591 | struct device_attribute *attr, | |
592 | const char *buf, size_t count) | |
593 | { | |
594 | unsigned long x; | |
595 | struct acpi_battery *battery = to_acpi_battery(dev_get_drvdata(dev)); | |
47a08c85 | 596 | if (sscanf(buf, "%lu\n", &x) == 1) |
508df92d AB |
597 | battery->alarm = x/1000; |
598 | if (acpi_battery_present(battery)) | |
599 | acpi_battery_set_alarm(battery); | |
600 | return count; | |
601 | } | |
602 | ||
603 | static struct device_attribute alarm_attr = { | |
01e8ef11 | 604 | .attr = {.name = "alarm", .mode = 0644}, |
508df92d AB |
605 | .show = acpi_battery_alarm_show, |
606 | .store = acpi_battery_alarm_store, | |
607 | }; | |
608 | ||
609 | static int sysfs_add_battery(struct acpi_battery *battery) | |
610 | { | |
611 | int result; | |
612 | ||
ae6f6187 | 613 | if (battery->power_unit == ACPI_BATTERY_POWER_UNIT_MA) { |
508df92d AB |
614 | battery->bat.properties = charge_battery_props; |
615 | battery->bat.num_properties = | |
616 | ARRAY_SIZE(charge_battery_props); | |
617 | } else { | |
618 | battery->bat.properties = energy_battery_props; | |
619 | battery->bat.num_properties = | |
620 | ARRAY_SIZE(energy_battery_props); | |
621 | } | |
622 | ||
623 | battery->bat.name = acpi_device_bid(battery->device); | |
624 | battery->bat.type = POWER_SUPPLY_TYPE_BATTERY; | |
625 | battery->bat.get_property = acpi_battery_get_property; | |
626 | ||
e0d1f09e ZR |
627 | result = power_supply_register_no_ws(&battery->device->dev, &battery->bat); |
628 | ||
508df92d AB |
629 | if (result) |
630 | return result; | |
631 | return device_create_file(battery->bat.dev, &alarm_attr); | |
632 | } | |
633 | ||
634 | static void sysfs_remove_battery(struct acpi_battery *battery) | |
635 | { | |
69d94ec6 | 636 | mutex_lock(&battery->sysfs_lock); |
9c921c22 | 637 | if (!battery->bat.dev) { |
69d94ec6 | 638 | mutex_unlock(&battery->sysfs_lock); |
508df92d | 639 | return; |
9c921c22 LT |
640 | } |
641 | ||
508df92d AB |
642 | device_remove_file(battery->bat.dev, &alarm_attr); |
643 | power_supply_unregister(&battery->bat); | |
9104476e | 644 | battery->bat.dev = NULL; |
69d94ec6 | 645 | mutex_unlock(&battery->sysfs_lock); |
bc76f90b HM |
646 | } |
647 | ||
4000e626 KI |
648 | static void find_battery(const struct dmi_header *dm, void *private) |
649 | { | |
650 | struct acpi_battery *battery = (struct acpi_battery *)private; | |
651 | /* Note: the hardcoded offsets below have been extracted from | |
652 | the source code of dmidecode. */ | |
653 | if (dm->type == DMI_ENTRY_PORTABLE_BATTERY && dm->length >= 8) { | |
654 | const u8 *dmi_data = (const u8 *)(dm + 1); | |
655 | int dmi_capacity = get_unaligned((const u16 *)(dmi_data + 6)); | |
656 | if (dm->length >= 18) | |
657 | dmi_capacity *= dmi_data[17]; | |
658 | if (battery->design_capacity * battery->design_voltage / 1000 | |
659 | != dmi_capacity && | |
660 | battery->design_capacity * 10 == dmi_capacity) | |
661 | set_bit(ACPI_BATTERY_QUIRK_THINKPAD_MAH, | |
662 | &battery->flags); | |
663 | } | |
664 | } | |
665 | ||
557d5868 ZR |
666 | /* |
667 | * According to the ACPI spec, some kinds of primary batteries can | |
668 | * report percentage battery remaining capacity directly to OS. | |
669 | * In this case, it reports the Last Full Charged Capacity == 100 | |
670 | * and BatteryPresentRate == 0xFFFFFFFF. | |
671 | * | |
672 | * Now we found some battery reports percentage remaining capacity | |
673 | * even if it's rechargeable. | |
674 | * https://bugzilla.kernel.org/show_bug.cgi?id=15979 | |
675 | * | |
676 | * Handle this correctly so that they won't break userspace. | |
677 | */ | |
7b78622d | 678 | static void acpi_battery_quirks(struct acpi_battery *battery) |
557d5868 ZR |
679 | { |
680 | if (test_bit(ACPI_BATTERY_QUIRK_PERCENTAGE_CAPACITY, &battery->flags)) | |
0f4c6547 | 681 | return; |
557d5868 | 682 | |
0f4c6547 NM |
683 | if (battery->full_charge_capacity == 100 && |
684 | battery->rate_now == ACPI_BATTERY_VALUE_UNKNOWN && | |
685 | battery->capacity_now >= 0 && battery->capacity_now <= 100) { | |
557d5868 ZR |
686 | set_bit(ACPI_BATTERY_QUIRK_PERCENTAGE_CAPACITY, &battery->flags); |
687 | battery->full_charge_capacity = battery->design_capacity; | |
688 | battery->capacity_now = (battery->capacity_now * | |
689 | battery->full_charge_capacity) / 100; | |
690 | } | |
4000e626 KI |
691 | |
692 | if (test_bit(ACPI_BATTERY_QUIRK_THINKPAD_MAH, &battery->flags)) | |
0f4c6547 | 693 | return; |
4000e626 KI |
694 | |
695 | if (battery->power_unit && dmi_name_in_vendors("LENOVO")) { | |
696 | const char *s; | |
697 | s = dmi_get_system_info(DMI_PRODUCT_VERSION); | |
ffd8a731 | 698 | if (s && !strncasecmp(s, "ThinkPad", 8)) { |
4000e626 KI |
699 | dmi_walk(find_battery, battery); |
700 | if (test_bit(ACPI_BATTERY_QUIRK_THINKPAD_MAH, | |
701 | &battery->flags) && | |
702 | battery->design_voltage) { | |
703 | battery->design_capacity = | |
704 | battery->design_capacity * | |
705 | 10000 / battery->design_voltage; | |
706 | battery->full_charge_capacity = | |
707 | battery->full_charge_capacity * | |
708 | 10000 / battery->design_voltage; | |
709 | battery->design_capacity_warning = | |
710 | battery->design_capacity_warning * | |
711 | 10000 / battery->design_voltage; | |
712 | battery->capacity_now = battery->capacity_now * | |
713 | 10000 / battery->design_voltage; | |
714 | } | |
715 | } | |
716 | } | |
557d5868 ZR |
717 | } |
718 | ||
9e50bc14 | 719 | static int acpi_battery_update(struct acpi_battery *battery, bool resume) |
b6ce4083 | 720 | { |
50b17851 | 721 | int result, old_present = acpi_battery_present(battery); |
97749cd9 | 722 | result = acpi_battery_get_status(battery); |
508df92d | 723 | if (result) |
b6ce4083 | 724 | return result; |
508df92d AB |
725 | if (!acpi_battery_present(battery)) { |
726 | sysfs_remove_battery(battery); | |
97749cd9 | 727 | battery->update_time = 0; |
508df92d | 728 | return 0; |
b6ce4083 | 729 | } |
9e50bc14 LT |
730 | |
731 | if (resume) | |
732 | return 0; | |
733 | ||
50b17851 AS |
734 | if (!battery->update_time || |
735 | old_present != acpi_battery_present(battery)) { | |
97749cd9 AS |
736 | result = acpi_battery_get_info(battery); |
737 | if (result) | |
738 | return result; | |
739 | acpi_battery_init_alarm(battery); | |
740 | } | |
eb03cb02 SH |
741 | if (!battery->bat.dev) { |
742 | result = sysfs_add_battery(battery); | |
743 | if (result) | |
744 | return result; | |
745 | } | |
557d5868 | 746 | result = acpi_battery_get_state(battery); |
e0d1f09e ZR |
747 | if (result) |
748 | return result; | |
7b78622d | 749 | acpi_battery_quirks(battery); |
e0d1f09e ZR |
750 | |
751 | /* | |
752 | * Wakeup the system if battery is critical low | |
753 | * or lower than the alarm level | |
754 | */ | |
755 | if ((battery->state & ACPI_BATTERY_STATE_CRITICAL) || | |
756 | (test_bit(ACPI_BATTERY_ALARM_PRESENT, &battery->flags) && | |
757 | (battery->capacity_now <= battery->alarm))) | |
758 | pm_wakeup_event(&battery->device->dev, 0); | |
759 | ||
557d5868 | 760 | return result; |
4bd35cdb VL |
761 | } |
762 | ||
da8aeb92 RW |
763 | static void acpi_battery_refresh(struct acpi_battery *battery) |
764 | { | |
c5971456 AW |
765 | int power_unit; |
766 | ||
da8aeb92 RW |
767 | if (!battery->bat.dev) |
768 | return; | |
769 | ||
c5971456 AW |
770 | power_unit = battery->power_unit; |
771 | ||
da8aeb92 | 772 | acpi_battery_get_info(battery); |
c5971456 AW |
773 | |
774 | if (power_unit == battery->power_unit) | |
775 | return; | |
776 | ||
777 | /* The battery has changed its reporting units. */ | |
da8aeb92 RW |
778 | sysfs_remove_battery(battery); |
779 | sysfs_add_battery(battery); | |
780 | } | |
781 | ||
3a670cc7 LT |
782 | /* -------------------------------------------------------------------------- |
783 | FS Interface (/proc) | |
784 | -------------------------------------------------------------------------- */ | |
785 | ||
786 | #ifdef CONFIG_ACPI_PROCFS_POWER | |
787 | static struct proc_dir_entry *acpi_battery_dir; | |
788 | ||
789 | static int acpi_battery_print_info(struct seq_file *seq, int result) | |
790 | { | |
791 | struct acpi_battery *battery = seq->private; | |
792 | ||
793 | if (result) | |
794 | goto end; | |
795 | ||
796 | seq_printf(seq, "present: %s\n", | |
797 | acpi_battery_present(battery) ? "yes" : "no"); | |
798 | if (!acpi_battery_present(battery)) | |
799 | goto end; | |
800 | if (battery->design_capacity == ACPI_BATTERY_VALUE_UNKNOWN) | |
801 | seq_printf(seq, "design capacity: unknown\n"); | |
802 | else | |
803 | seq_printf(seq, "design capacity: %d %sh\n", | |
804 | battery->design_capacity, | |
805 | acpi_battery_units(battery)); | |
806 | ||
807 | if (battery->full_charge_capacity == ACPI_BATTERY_VALUE_UNKNOWN) | |
808 | seq_printf(seq, "last full capacity: unknown\n"); | |
809 | else | |
810 | seq_printf(seq, "last full capacity: %d %sh\n", | |
811 | battery->full_charge_capacity, | |
812 | acpi_battery_units(battery)); | |
813 | ||
814 | seq_printf(seq, "battery technology: %srechargeable\n", | |
815 | (!battery->technology)?"non-":""); | |
816 | ||
817 | if (battery->design_voltage == ACPI_BATTERY_VALUE_UNKNOWN) | |
818 | seq_printf(seq, "design voltage: unknown\n"); | |
819 | else | |
820 | seq_printf(seq, "design voltage: %d mV\n", | |
821 | battery->design_voltage); | |
822 | seq_printf(seq, "design capacity warning: %d %sh\n", | |
823 | battery->design_capacity_warning, | |
824 | acpi_battery_units(battery)); | |
825 | seq_printf(seq, "design capacity low: %d %sh\n", | |
826 | battery->design_capacity_low, | |
827 | acpi_battery_units(battery)); | |
828 | seq_printf(seq, "cycle count: %i\n", battery->cycle_count); | |
829 | seq_printf(seq, "capacity granularity 1: %d %sh\n", | |
830 | battery->capacity_granularity_1, | |
831 | acpi_battery_units(battery)); | |
832 | seq_printf(seq, "capacity granularity 2: %d %sh\n", | |
833 | battery->capacity_granularity_2, | |
834 | acpi_battery_units(battery)); | |
835 | seq_printf(seq, "model number: %s\n", battery->model_number); | |
836 | seq_printf(seq, "serial number: %s\n", battery->serial_number); | |
837 | seq_printf(seq, "battery type: %s\n", battery->type); | |
838 | seq_printf(seq, "OEM info: %s\n", battery->oem_info); | |
839 | end: | |
840 | if (result) | |
841 | seq_printf(seq, "ERROR: Unable to read battery info\n"); | |
842 | return result; | |
843 | } | |
844 | ||
845 | static int acpi_battery_print_state(struct seq_file *seq, int result) | |
846 | { | |
847 | struct acpi_battery *battery = seq->private; | |
848 | ||
849 | if (result) | |
850 | goto end; | |
851 | ||
852 | seq_printf(seq, "present: %s\n", | |
853 | acpi_battery_present(battery) ? "yes" : "no"); | |
854 | if (!acpi_battery_present(battery)) | |
855 | goto end; | |
856 | ||
857 | seq_printf(seq, "capacity state: %s\n", | |
858 | (battery->state & 0x04) ? "critical" : "ok"); | |
859 | if ((battery->state & 0x01) && (battery->state & 0x02)) | |
860 | seq_printf(seq, | |
861 | "charging state: charging/discharging\n"); | |
862 | else if (battery->state & 0x01) | |
863 | seq_printf(seq, "charging state: discharging\n"); | |
864 | else if (battery->state & 0x02) | |
865 | seq_printf(seq, "charging state: charging\n"); | |
866 | else | |
867 | seq_printf(seq, "charging state: charged\n"); | |
868 | ||
869 | if (battery->rate_now == ACPI_BATTERY_VALUE_UNKNOWN) | |
870 | seq_printf(seq, "present rate: unknown\n"); | |
871 | else | |
872 | seq_printf(seq, "present rate: %d %s\n", | |
873 | battery->rate_now, acpi_battery_units(battery)); | |
874 | ||
875 | if (battery->capacity_now == ACPI_BATTERY_VALUE_UNKNOWN) | |
876 | seq_printf(seq, "remaining capacity: unknown\n"); | |
877 | else | |
878 | seq_printf(seq, "remaining capacity: %d %sh\n", | |
879 | battery->capacity_now, acpi_battery_units(battery)); | |
880 | if (battery->voltage_now == ACPI_BATTERY_VALUE_UNKNOWN) | |
881 | seq_printf(seq, "present voltage: unknown\n"); | |
882 | else | |
883 | seq_printf(seq, "present voltage: %d mV\n", | |
884 | battery->voltage_now); | |
885 | end: | |
886 | if (result) | |
887 | seq_printf(seq, "ERROR: Unable to read battery state\n"); | |
888 | ||
889 | return result; | |
890 | } | |
891 | ||
892 | static int acpi_battery_print_alarm(struct seq_file *seq, int result) | |
893 | { | |
894 | struct acpi_battery *battery = seq->private; | |
895 | ||
896 | if (result) | |
897 | goto end; | |
898 | ||
899 | if (!acpi_battery_present(battery)) { | |
900 | seq_printf(seq, "present: no\n"); | |
901 | goto end; | |
902 | } | |
903 | seq_printf(seq, "alarm: "); | |
904 | if (!battery->alarm) | |
905 | seq_printf(seq, "unsupported\n"); | |
906 | else | |
907 | seq_printf(seq, "%u %sh\n", battery->alarm, | |
908 | acpi_battery_units(battery)); | |
909 | end: | |
910 | if (result) | |
911 | seq_printf(seq, "ERROR: Unable to read battery alarm\n"); | |
912 | return result; | |
913 | } | |
914 | ||
915 | static ssize_t acpi_battery_write_alarm(struct file *file, | |
916 | const char __user * buffer, | |
917 | size_t count, loff_t * ppos) | |
918 | { | |
919 | int result = 0; | |
920 | char alarm_string[12] = { '\0' }; | |
921 | struct seq_file *m = file->private_data; | |
922 | struct acpi_battery *battery = m->private; | |
923 | ||
924 | if (!battery || (count > sizeof(alarm_string) - 1)) | |
925 | return -EINVAL; | |
926 | if (!acpi_battery_present(battery)) { | |
927 | result = -ENODEV; | |
928 | goto end; | |
929 | } | |
930 | if (copy_from_user(alarm_string, buffer, count)) { | |
931 | result = -EFAULT; | |
932 | goto end; | |
933 | } | |
934 | alarm_string[count] = '\0'; | |
3d915894 CJ |
935 | if (kstrtoint(alarm_string, 0, &battery->alarm)) { |
936 | result = -EINVAL; | |
937 | goto end; | |
938 | } | |
3a670cc7 LT |
939 | result = acpi_battery_set_alarm(battery); |
940 | end: | |
941 | if (!result) | |
942 | return count; | |
943 | return result; | |
944 | } | |
945 | ||
946 | typedef int(*print_func)(struct seq_file *seq, int result); | |
947 | ||
948 | static print_func acpi_print_funcs[ACPI_BATTERY_NUMFILES] = { | |
949 | acpi_battery_print_info, | |
950 | acpi_battery_print_state, | |
951 | acpi_battery_print_alarm, | |
952 | }; | |
953 | ||
954 | static int acpi_battery_read(int fid, struct seq_file *seq) | |
955 | { | |
956 | struct acpi_battery *battery = seq->private; | |
9e50bc14 | 957 | int result = acpi_battery_update(battery, false); |
3a670cc7 LT |
958 | return acpi_print_funcs[fid](seq, result); |
959 | } | |
960 | ||
961 | #define DECLARE_FILE_FUNCTIONS(_name) \ | |
962 | static int acpi_battery_read_##_name(struct seq_file *seq, void *offset) \ | |
963 | { \ | |
964 | return acpi_battery_read(_name##_tag, seq); \ | |
965 | } \ | |
966 | static int acpi_battery_##_name##_open_fs(struct inode *inode, struct file *file) \ | |
967 | { \ | |
968 | return single_open(file, acpi_battery_read_##_name, PDE_DATA(inode)); \ | |
969 | } | |
970 | ||
971 | DECLARE_FILE_FUNCTIONS(info); | |
972 | DECLARE_FILE_FUNCTIONS(state); | |
973 | DECLARE_FILE_FUNCTIONS(alarm); | |
974 | ||
975 | #undef DECLARE_FILE_FUNCTIONS | |
976 | ||
977 | #define FILE_DESCRIPTION_RO(_name) \ | |
978 | { \ | |
979 | .name = __stringify(_name), \ | |
980 | .mode = S_IRUGO, \ | |
981 | .ops = { \ | |
982 | .open = acpi_battery_##_name##_open_fs, \ | |
983 | .read = seq_read, \ | |
984 | .llseek = seq_lseek, \ | |
985 | .release = single_release, \ | |
986 | .owner = THIS_MODULE, \ | |
987 | }, \ | |
988 | } | |
989 | ||
990 | #define FILE_DESCRIPTION_RW(_name) \ | |
991 | { \ | |
992 | .name = __stringify(_name), \ | |
993 | .mode = S_IFREG | S_IRUGO | S_IWUSR, \ | |
994 | .ops = { \ | |
995 | .open = acpi_battery_##_name##_open_fs, \ | |
996 | .read = seq_read, \ | |
997 | .llseek = seq_lseek, \ | |
998 | .write = acpi_battery_write_##_name, \ | |
999 | .release = single_release, \ | |
1000 | .owner = THIS_MODULE, \ | |
1001 | }, \ | |
1002 | } | |
1003 | ||
1004 | static const struct battery_file { | |
1005 | struct file_operations ops; | |
1006 | umode_t mode; | |
1007 | const char *name; | |
1008 | } acpi_battery_file[] = { | |
1009 | FILE_DESCRIPTION_RO(info), | |
1010 | FILE_DESCRIPTION_RO(state), | |
1011 | FILE_DESCRIPTION_RW(alarm), | |
1012 | }; | |
1013 | ||
1014 | #undef FILE_DESCRIPTION_RO | |
1015 | #undef FILE_DESCRIPTION_RW | |
1016 | ||
1017 | static int acpi_battery_add_fs(struct acpi_device *device) | |
1018 | { | |
1019 | struct proc_dir_entry *entry = NULL; | |
1020 | int i; | |
1021 | ||
1022 | printk(KERN_WARNING PREFIX "Deprecated procfs I/F for battery is loaded," | |
1023 | " please retry with CONFIG_ACPI_PROCFS_POWER cleared\n"); | |
1024 | if (!acpi_device_dir(device)) { | |
1025 | acpi_device_dir(device) = proc_mkdir(acpi_device_bid(device), | |
1026 | acpi_battery_dir); | |
1027 | if (!acpi_device_dir(device)) | |
1028 | return -ENODEV; | |
1029 | } | |
1030 | ||
1031 | for (i = 0; i < ACPI_BATTERY_NUMFILES; ++i) { | |
1032 | entry = proc_create_data(acpi_battery_file[i].name, | |
1033 | acpi_battery_file[i].mode, | |
1034 | acpi_device_dir(device), | |
1035 | &acpi_battery_file[i].ops, | |
1036 | acpi_driver_data(device)); | |
1037 | if (!entry) | |
1038 | return -ENODEV; | |
1039 | } | |
1040 | return 0; | |
1041 | } | |
1042 | ||
1043 | static void acpi_battery_remove_fs(struct acpi_device *device) | |
1044 | { | |
1045 | int i; | |
1046 | if (!acpi_device_dir(device)) | |
1047 | return; | |
1048 | for (i = 0; i < ACPI_BATTERY_NUMFILES; ++i) | |
1049 | remove_proc_entry(acpi_battery_file[i].name, | |
1050 | acpi_device_dir(device)); | |
1051 | ||
1052 | remove_proc_entry(acpi_device_bid(device), acpi_battery_dir); | |
1053 | acpi_device_dir(device) = NULL; | |
1054 | } | |
1055 | ||
1056 | #endif | |
1057 | ||
1da177e4 LT |
1058 | /* -------------------------------------------------------------------------- |
1059 | Driver Interface | |
1060 | -------------------------------------------------------------------------- */ | |
1061 | ||
d9406691 | 1062 | static void acpi_battery_notify(struct acpi_device *device, u32 event) |
1da177e4 | 1063 | { |
d9406691 | 1064 | struct acpi_battery *battery = acpi_driver_data(device); |
153e500f | 1065 | struct device *old; |
d9406691 | 1066 | |
1da177e4 | 1067 | if (!battery) |
d550d98d | 1068 | return; |
153e500f | 1069 | old = battery->bat.dev; |
f43691c6 AM |
1070 | /* |
1071 | * On Acer Aspire V5-573G notifications are sometimes triggered too | |
1072 | * early. For example, when AC is unplugged and notification is | |
1073 | * triggered, battery state is still reported as "Full", and changes to | |
1074 | * "Discharging" only after short delay, without any notification. | |
1075 | */ | |
1076 | if (battery_notification_delay_ms > 0) | |
1077 | msleep(battery_notification_delay_ms); | |
da8aeb92 RW |
1078 | if (event == ACPI_BATTERY_NOTIFY_INFO) |
1079 | acpi_battery_refresh(battery); | |
9e50bc14 | 1080 | acpi_battery_update(battery, false); |
f1d4661a | 1081 | acpi_bus_generate_netlink_event(device->pnp.device_class, |
0794469d | 1082 | dev_name(&device->dev), event, |
9ea7d575 | 1083 | acpi_battery_present(battery)); |
411e0f77 | 1084 | acpi_notifier_call_chain(device, event, acpi_battery_present(battery)); |
2345baf4 | 1085 | /* acpi_battery_update could remove power_supply object */ |
153e500f | 1086 | if (old && battery->bat.dev) |
f79e1cec | 1087 | power_supply_changed(&battery->bat); |
1da177e4 LT |
1088 | } |
1089 | ||
25be5821 KM |
1090 | static int battery_notify(struct notifier_block *nb, |
1091 | unsigned long mode, void *_unused) | |
1092 | { | |
1093 | struct acpi_battery *battery = container_of(nb, struct acpi_battery, | |
1094 | pm_nb); | |
9e50bc14 LT |
1095 | int result; |
1096 | ||
25be5821 | 1097 | switch (mode) { |
d5a5911b | 1098 | case PM_POST_HIBERNATION: |
25be5821 | 1099 | case PM_POST_SUSPEND: |
9e50bc14 LT |
1100 | if (!acpi_battery_present(battery)) |
1101 | return 0; | |
1102 | ||
1103 | if (!battery->bat.dev) { | |
1104 | result = acpi_battery_get_info(battery); | |
1105 | if (result) | |
1106 | return result; | |
1107 | ||
1108 | result = sysfs_add_battery(battery); | |
1109 | if (result) | |
1110 | return result; | |
1111 | } else | |
1112 | acpi_battery_refresh(battery); | |
1113 | ||
1114 | acpi_battery_init_alarm(battery); | |
1115 | acpi_battery_get_state(battery); | |
25be5821 KM |
1116 | break; |
1117 | } | |
1118 | ||
1119 | return 0; | |
1120 | } | |
1121 | ||
3f5dc08f AM |
1122 | static int battery_bix_broken_package_quirk(const struct dmi_system_id *d) |
1123 | { | |
1124 | battery_bix_broken_package = 1; | |
1125 | return 0; | |
1126 | } | |
1127 | ||
f43691c6 AM |
1128 | static int battery_notification_delay_quirk(const struct dmi_system_id *d) |
1129 | { | |
1130 | battery_notification_delay_ms = 1000; | |
1131 | return 0; | |
1132 | } | |
1133 | ||
a90b4038 LT |
1134 | static struct dmi_system_id bat_dmi_table[] = { |
1135 | { | |
3f5dc08f | 1136 | .callback = battery_bix_broken_package_quirk, |
a90b4038 LT |
1137 | .ident = "NEC LZ750/LS", |
1138 | .matches = { | |
1139 | DMI_MATCH(DMI_SYS_VENDOR, "NEC"), | |
1140 | DMI_MATCH(DMI_PRODUCT_NAME, "PC-LZ750LS"), | |
1141 | }, | |
1142 | }, | |
f43691c6 AM |
1143 | { |
1144 | .callback = battery_notification_delay_quirk, | |
1145 | .ident = "Acer Aspire V5-573G", | |
1146 | .matches = { | |
1147 | DMI_MATCH(DMI_SYS_VENDOR, "Acer"), | |
1148 | DMI_MATCH(DMI_PRODUCT_NAME, "Aspire V5-573G"), | |
1149 | }, | |
1150 | }, | |
a90b4038 LT |
1151 | {}, |
1152 | }; | |
1153 | ||
75646e75 LT |
1154 | /* |
1155 | * Some machines'(E,G Lenovo Z480) ECs are not stable | |
1156 | * during boot up and this causes battery driver fails to be | |
1157 | * probed due to failure of getting battery information | |
1158 | * from EC sometimes. After several retries, the operation | |
1159 | * may work. So add retry code here and 20ms sleep between | |
1160 | * every retries. | |
1161 | */ | |
1162 | static int acpi_battery_update_retry(struct acpi_battery *battery) | |
1163 | { | |
1164 | int retry, ret; | |
1165 | ||
1166 | for (retry = 5; retry; retry--) { | |
1167 | ret = acpi_battery_update(battery, false); | |
1168 | if (!ret) | |
1169 | break; | |
1170 | ||
1171 | msleep(20); | |
1172 | } | |
1173 | return ret; | |
1174 | } | |
1175 | ||
4be44fcd | 1176 | static int acpi_battery_add(struct acpi_device *device) |
1da177e4 | 1177 | { |
4be44fcd | 1178 | int result = 0; |
4be44fcd | 1179 | struct acpi_battery *battery = NULL; |
952c63e9 | 1180 | |
1da177e4 | 1181 | if (!device) |
d550d98d | 1182 | return -EINVAL; |
36bcbec7 | 1183 | battery = kzalloc(sizeof(struct acpi_battery), GFP_KERNEL); |
1da177e4 | 1184 | if (!battery) |
d550d98d | 1185 | return -ENOMEM; |
145def84 | 1186 | battery->device = device; |
1da177e4 LT |
1187 | strcpy(acpi_device_name(device), ACPI_BATTERY_DEVICE_NAME); |
1188 | strcpy(acpi_device_class(device), ACPI_BATTERY_CLASS); | |
db89b4f0 | 1189 | device->driver_data = battery; |
038fdea2 | 1190 | mutex_init(&battery->lock); |
69d94ec6 | 1191 | mutex_init(&battery->sysfs_lock); |
952c63e9 | 1192 | if (acpi_has_method(battery->device->handle, "_BIX")) |
c67fcd67 | 1193 | set_bit(ACPI_BATTERY_XINFO_PRESENT, &battery->flags); |
75646e75 LT |
1194 | |
1195 | result = acpi_battery_update_retry(battery); | |
eb03cb02 SH |
1196 | if (result) |
1197 | goto fail; | |
75646e75 | 1198 | |
3a670cc7 LT |
1199 | #ifdef CONFIG_ACPI_PROCFS_POWER |
1200 | result = acpi_battery_add_fs(device); | |
1201 | #endif | |
1202 | if (result) { | |
1203 | #ifdef CONFIG_ACPI_PROCFS_POWER | |
1204 | acpi_battery_remove_fs(device); | |
1205 | #endif | |
1206 | goto fail; | |
1207 | } | |
25be5821 | 1208 | |
e80bba4b SH |
1209 | printk(KERN_INFO PREFIX "%s Slot [%s] (battery %s)\n", |
1210 | ACPI_BATTERY_DEVICE_NAME, acpi_device_bid(device), | |
1211 | device->status.battery_present ? "present" : "absent"); | |
1212 | ||
25be5821 KM |
1213 | battery->pm_nb.notifier_call = battery_notify; |
1214 | register_pm_notifier(&battery->pm_nb); | |
1215 | ||
e0d1f09e ZR |
1216 | device_init_wakeup(&device->dev, 1); |
1217 | ||
d550d98d | 1218 | return result; |
e80bba4b SH |
1219 | |
1220 | fail: | |
1221 | sysfs_remove_battery(battery); | |
1222 | mutex_destroy(&battery->lock); | |
69d94ec6 | 1223 | mutex_destroy(&battery->sysfs_lock); |
e80bba4b SH |
1224 | kfree(battery); |
1225 | return result; | |
1da177e4 LT |
1226 | } |
1227 | ||
51fac838 | 1228 | static int acpi_battery_remove(struct acpi_device *device) |
1da177e4 | 1229 | { |
4be44fcd | 1230 | struct acpi_battery *battery = NULL; |
1da177e4 | 1231 | |
1da177e4 | 1232 | if (!device || !acpi_driver_data(device)) |
d550d98d | 1233 | return -EINVAL; |
e0d1f09e | 1234 | device_init_wakeup(&device->dev, 0); |
50dd0969 | 1235 | battery = acpi_driver_data(device); |
25be5821 | 1236 | unregister_pm_notifier(&battery->pm_nb); |
3a670cc7 LT |
1237 | #ifdef CONFIG_ACPI_PROCFS_POWER |
1238 | acpi_battery_remove_fs(device); | |
1239 | #endif | |
508df92d | 1240 | sysfs_remove_battery(battery); |
038fdea2 | 1241 | mutex_destroy(&battery->lock); |
69d94ec6 | 1242 | mutex_destroy(&battery->sysfs_lock); |
1da177e4 | 1243 | kfree(battery); |
d550d98d | 1244 | return 0; |
1da177e4 LT |
1245 | } |
1246 | ||
90692404 | 1247 | #ifdef CONFIG_PM_SLEEP |
34c4415a | 1248 | /* this is needed to learn about changes made in suspended state */ |
a6f50dc8 | 1249 | static int acpi_battery_resume(struct device *dev) |
34c4415a JK |
1250 | { |
1251 | struct acpi_battery *battery; | |
a6f50dc8 RW |
1252 | |
1253 | if (!dev) | |
34c4415a | 1254 | return -EINVAL; |
a6f50dc8 RW |
1255 | |
1256 | battery = acpi_driver_data(to_acpi_device(dev)); | |
1257 | if (!battery) | |
1258 | return -EINVAL; | |
1259 | ||
f1d4661a | 1260 | battery->update_time = 0; |
9e50bc14 | 1261 | acpi_battery_update(battery, true); |
b6ce4083 | 1262 | return 0; |
34c4415a | 1263 | } |
7f6895c6 SK |
1264 | #else |
1265 | #define acpi_battery_resume NULL | |
90692404 | 1266 | #endif |
34c4415a | 1267 | |
a6f50dc8 RW |
1268 | static SIMPLE_DEV_PM_OPS(acpi_battery_pm, NULL, acpi_battery_resume); |
1269 | ||
aa650bbd AS |
1270 | static struct acpi_driver acpi_battery_driver = { |
1271 | .name = "battery", | |
1272 | .class = ACPI_BATTERY_CLASS, | |
1273 | .ids = battery_device_ids, | |
d9406691 | 1274 | .flags = ACPI_DRIVER_ALL_NOTIFY_EVENTS, |
aa650bbd AS |
1275 | .ops = { |
1276 | .add = acpi_battery_add, | |
aa650bbd | 1277 | .remove = acpi_battery_remove, |
d9406691 | 1278 | .notify = acpi_battery_notify, |
aa650bbd | 1279 | }, |
a6f50dc8 | 1280 | .drv.pm = &acpi_battery_pm, |
aa650bbd AS |
1281 | }; |
1282 | ||
b0cbc861 | 1283 | static void __init acpi_battery_init_async(void *unused, async_cookie_t cookie) |
1da177e4 | 1284 | { |
4d8316d5 | 1285 | if (acpi_disabled) |
0f66af53 | 1286 | return; |
a90b4038 | 1287 | |
3f5dc08f | 1288 | dmi_check_system(bat_dmi_table); |
3a670cc7 LT |
1289 | |
1290 | #ifdef CONFIG_ACPI_PROCFS_POWER | |
1291 | acpi_battery_dir = acpi_lock_battery_dir(); | |
1292 | if (!acpi_battery_dir) | |
1293 | return; | |
1294 | #endif | |
1295 | if (acpi_bus_register_driver(&acpi_battery_driver) < 0) { | |
1296 | #ifdef CONFIG_ACPI_PROCFS_POWER | |
1297 | acpi_unlock_battery_dir(acpi_battery_dir); | |
1298 | #endif | |
1299 | return; | |
1300 | } | |
1301 | return; | |
0f66af53 AV |
1302 | } |
1303 | ||
1304 | static int __init acpi_battery_init(void) | |
1305 | { | |
1306 | async_schedule(acpi_battery_init_async, NULL); | |
d550d98d | 1307 | return 0; |
1da177e4 LT |
1308 | } |
1309 | ||
4be44fcd | 1310 | static void __exit acpi_battery_exit(void) |
1da177e4 | 1311 | { |
1da177e4 | 1312 | acpi_bus_unregister_driver(&acpi_battery_driver); |
3a670cc7 LT |
1313 | #ifdef CONFIG_ACPI_PROCFS_POWER |
1314 | acpi_unlock_battery_dir(acpi_battery_dir); | |
1315 | #endif | |
1da177e4 LT |
1316 | } |
1317 | ||
1da177e4 LT |
1318 | module_init(acpi_battery_init); |
1319 | module_exit(acpi_battery_exit); |